Attachment-plug.



PATBNTED FEB. 18,1908.

D. L. WEBB.

ATTACHMENT PLUG.

APPLICATION FILED APR. 16.1903.

QM $9M;

UXITED STATES PATEKT OFFICE.

DAVID L. WEBB, OF NEW YORK, X. Y., ASSIGN UK IlnECT 1ND MESNEASSIGNMENTS, TO BENJAMIN ELECTRIC MANUFAGTURIN ALY, UF (H CXGQ,ILLINOIS, A CORPORA- TION OF ILLINOIS.

AT! RC h FNT-I LUG.

No. 879,830. Specific to. at 'xe s Patent. Patented Feb. 18, 1908.Application filed April 16 A- it :ria N9. 152 386 T a all trite-m lt mayconcern: 1 tion of thebase or disk A is hollowed and Be it known that I,Dmm L. 'EBB, a l provided with r central raised portion E of citizen ofthe United States, and resident of insulating mater ll. An aperture lasses through the disk for the insertion of a ongithe borough ofBrooklyn, count) of Kings, 7 city and State of New York, have inventedtudinally movable spindle 6, provided with 60 certain new and usefulimprovements in an insulating d sk ll atone cud and an inAttachment-Plugs, of which the following is v sulnting handle J at theother. Secured to a specification, accompanied by drawings. the underside of the disk or base A are the ill) invention relates to atta hment,plugs f s wing fingers K, of which there may be. any for electriclights, although the invention isl tiesired number, in this instancethree, being 65 not limi ed to use with such plugs but} may i shown. Thelingers ii may be suitably athe utilized in connection with electriclamp tnched to the base A, as shown they be sockets if des red, and inother connections inc; secured to a metallic rin L which is suit.- whereit may be found applicable. ably fastened to the disk by means of theThe objects of my invention are to iinscrews 0. 70 prove upon theconstruction of attachment in the operation of my improved device, plugsand similar devices, and enable the the construction is such that whenthe spinplug to be readily and expeditiously secured dle G is movedlongitudinally to carry the into the cooperating socketby one movement,sulating disk ll between the ends of the as for instance, by a simplepush, instead of spring lingers K, said lingers will be forced 75 by atwisting or turning operation as has i outwardly and their pressure uponthe disk heretofore been cnstomaqvwith cooperating II will nuiintiiinthe disk between the ends screw-threaded sockets and screw-threaded olthe lingers. attachment )lJgS. If desired, the periphery of the disk IIFurther objects of my invention will heremay be grooved as shown, .toaid in llltilll- 80 inafter appear, and to these onds'my invontniuiu:the disk in position between the ends tion consists of the deviceembodying the of the lingers, and the lingers may be curved features ofconstruction, combinati ns of as shtwn, to cooperate with the groove inelements, and arrangement of parts, having the. disk. .\Cl.Uldlng tothis construction the general mode of operation substantially itwill beseen that when the plug is placed as hereinafter fully described andclaimed in within the cooperating socket 1, pressure this specificationand shown in the accomupon the knob or handle J will force the partyingdrawings in which spindle G longitudinally through the base A Figure 1is a side elevation of an attachand the fingers will be iorced outwardlyinto 35 ment plug (I1\lJ0tl)'lIlI my invention; Fig. 2 contact with thescrew-threaded socket, to is a longitudinal sectional view of the atmakeelectrical contact between the lingers tachment plug and a portion of acofiporatand the socket. As shown, a s )rin" contact ing socket; Fig. 3is a top plan view on the Q is provided upon the disk I an in elecline22 of Fig.2, withthccasine oi thcplug trical contact with the spindle G,so that 40 removed; and Fig. 4 is a bottom plan view of electricalcontact is made between the spring the plug. contact Q and the centralcontact it of the Referring to the drawings, my improved socket.According to this construction my plug comprisesas shown, theiusulntiug'basc improved attachment; plug is adapted for or bod}: Awhich may be of any sHitableinuse with the standardsockets. 45 sulatingnuttcrial, as for instance, mlcclnin. Suit-able provision is all'ordcdfor attach- To this body portion armsccurcd suitable ing the positiveand mgativc leading-in contacts and operative conu cti 'ns hcreinwires Sand T to the plug. As shown, mealter to be described. While the bodyportnllic contacts U and Y are suitably secure tion A may be etmstructcdin any desired within therecessed portion of the insulating 50 manner, Ihave shown it, in the form of a i base A. The contact V is secured tothe circular disk having an outside llnngc ll 1 lmsc A by means of ascrew or rivet a, and forming a seat for the metallic cover or caslbinding screws 1) and c are provided pon in; U, which may be dctachablyconnected said contact V. The contact U is suitably to the body ortionby means of suitable set l secured to the base A by means of the screwscrews D. n this instance the upper porl or rivet d which passescompletely through contacts and one of said terminals, operated by shiftof said member.

i t l 9. The combination with an electric socket having a plurality ofpro ections upon its 1nterior arranged at dill'crcnt elevation ot acontact plug adapted to be inserted longitudinall) within the socket, alocking dog carricd by said plug adapted to be thrown intengagementvvith the. rojccting portions of said socket to hold the plugin position, and

means for imparting movement to the dog.

having also a side contact disposed to engage the corrugated surface ofsaid socket, said side contact being inwardly movable to perinit thesame to enter said socket.

11. The combination with a socket having a grooved inner surfaceconstituting one pole and a contact member at the bottom of said socketconstituting the other pole, of anattachment plug having a body ofinsulating material, a contact member carried thereby and so located asto engage the pole atv the bottom of the socket, and another contactmember arranged to engage the grooved pole of said socket, saidlast-named contact memher being made resilient to permit the same toenter said socket.

12. An attachment plug for cooperation with a socket having aS"10\lllltfl(l0tl outer contact and a center contact, said attachmentplug having a contact disposed for engagement with the center contact ofthe socket, and having also a side contact disposed to engage thethreaded contact of the socket, said side Contact being movable inwardlyto permit the same to enter the socket.

13. An attachment plug adapted lor cooperation with a socket having acenter pole and a corrugated side pole, said attachment.

plug having a body of insulating material, a contact member carriedthereby and so located as to engage. the center pole of the socket, andhaving also another contact member disposed to engage the corrugatedpole of said socket, said last-named contact member being made resilientto permit the same to enter the socket.

14. Au attachment plug for cooperation with a socket having a threadedring contact and a. center contact, said attacluncnt plug having acenter contact disposed for engag ment with the center contact of thesocket and having also a ribbed contact disposed for engagement with thering contact of the socket, said corrugated contact being made i :ienter i' laterally movable to permit it socket.

to. 'lhe-combination with a lamp-r ceding sock t having a center conta tto; one unit tlicrcot and a ring ont -"1 l -"rl. the other pole thereof,ol'an =-t*- :z-mcn: ,f having a center contact adapted to engag thecenter contact. of said socket. and having also a contact laterallymovablc into engagement with the ring contact of said socket.

16. The combination with a iamp-receiving socket having a ring cont actand accntcr conta 't, of an attachment plu' having a vicldablc centercontact adapted for engagement with the center contact ol aid sock t,and having also a contact laterally movable into engagement with thering contact of said socket. v

17. The. combination with a it zn,'i -r-.-c-iving socket having a centercontav't and a ring contact, of an attachment plug inl' cooperationtherewith having a center contact, and having also a yieldablc outercontact adapted for engagement with the ring cwrta t ol' said socket.

18. The combination with a ianip-receiving socket having a ring contactand a center contact, of an attachment plug for too eration therewith,said attachment plug being provided with a laterally-momblecontactadapted for engagement. with -id ring contact. and having also acent r c tt-actdisposed for engagement with said center contact of saidsocket.

19. An attachment. plug for cooperation with a soc.ke.-naving a ringontact and a center contact, said attachment plug having a centercontact for engagement. vvith the center contact of the socket. a side.contact latch-all) movable for engagement nith the ring contact ol ihcsocket. and means for manually moving the side contact into engagementwith the ring contact of the socket.

.20. An attachment plug t'or crca' threaded electric lamp sockets,comprising an insulating base, a center contact, an outer contact, meansfor laterally moving said last. mentioned contact, and binding posts forthe leading-in wires.

21. An attachment plug f r screw threaded electric lamp socketscomprising an insulatmg base. a center contact, an outer contact,

means for lat crally xpanding and contracting said la t mentionedcontact, binding posts act-.cssiblclrom thcl'ront oi tiH- plug, and aremovable metal casing orcap i'-:rsaid bicdmg posts.

in. tcsllrnon) \vhcrtml' l have signed tl is spccihcation m the presenceof tvro subscri ing witnesses.

DAYll) L. EBB.

'1' tncsses MAX LOEWENTIIAL, M. CLAYTON.

Plan-a

